Wide body of water formed where a large river meets the sea; contains both fresh and salt water

1. Intermolecular forces between two substances that cause them to stick together; causes droplets to form in liquids

2. Wide body of water formed where a large river meets the sea; contains both fresh and salt water

3. Process in which cold, nutrient-rich water from the ocean depths rise to the ocean’s surface

4. Property of floating on the surface of a liquid

5. Heat required to raise the temperature of one gram of a substance by one degree

6. Property of water in which there exists a positive pole and a negative pole

7. The ability of a substance to transmit heat, sound, or electricity

8. Amount of a substance that can be dissolved in a given amount of solvent

9. Point at which a liquid boils and begins to change to a vapor or gas

10. Water on or surrounding the surface of the Earth, including the water of the oceans and the water in the atmosphere

11. Force of attraction that causes two different substances to join; causes water to spread over a surface

12. Single, identifiable, localized source of air, water, thermal, noise, or air pollution

13. Mass of a substance per unit of volume

14. Smallest form of a substance that cannot be reduced to a simpler substance by chemical means

15. Pure substance composed of two or more elements whose composition is constant

16. Measure of the strength of an acid or a base; neutral solutions equal 7, where acids are below 7 and bases are above 7

17. Amount of oxygen dissolved in a body of water as an indication of the degree of health of the water and its ability to support a balanced aquatic ecosystem

18. Property of water that describes clearness or transparency because of the amount of suspended sediment in the water

19. Process in which one or more substances are changed into others by rearranging atomic bonds

20. Substance that is present at the start of a chemical reaction

21. Substance resulting from a chemical reaction

22. Fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found

23. Chronologic schema relating stratigraphy to time that is used by geologists to describe the passing the timing and relationships between events that have occurred in Earth’s history

24. Law of geology that states the youngest sediments or rocks are at the top of a rock layer and the oldest are at the bottom

25. Discontinuity in rock sequences indicating an interruption of sedimentation

26. Method of analyzing chemical properties of matter based on bands in their optical spectrum of the electromagnetic spectrum

27. Measure of the proportion of light reflected, absorbed, and transmitted at various wavelengths

28. Spreading of urban development into areas adjoining or surrounding the edge of a city

29. Erosion or breakdown or rock into smaller fragments by natural physical means (frost, roots, etc.)

30. Consisting of a single cell

31. To cause a solid solution to be separated from a solution

32. The amount of space occupied by an object

33. Measure of the number of atoms an object possesses

34. Disease characterized by high levels of glucose in the blood; treated with insulin and controlled diet

35. Respiratory disorder that results in wheezing and difficulty breathing; often triggered by pollution or exercise

36. Process of cleaning and sterilizing that promotes better health

37. Cell division; cells divide into new cells containing the same number of chromosomes

38. Cell division that produces reproductive cells (gametes) that have half the number of chromosomes

39. Tendency of a body or system to seek and maintain a condition of balance or equilibrium within its internal environment

40. Cellular organelle that functions in energy production for the cell

41. Semipermeable membrane that surrounds the cytoplasm of a cell

42. An organism that grows, feeds, and is sheltered on or in a different organism while contributing nothing to the survival of its host

43. Any disease producing agent such as a virus, bacteria, protist or other microorganism

44. Rapid spread of a disease

45. Disease that can be transmitted through direct or indirect contact; contagious

46. A person or animal that shows no symptoms of a disease but is capable of transmitting it to others

47. An insect or other organism that transmits a pathogenic disease from one host to another

48. Synonym for microorganism, especially bacteria

49. Colonial, freshwater green algae that forms a hollow green sphere of flagellated cells

50. An increase in the size and number of cells in an organism